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While pressing the flap, move the half-circle lock to free the trumpet from the tank.
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Take the new bottle and remove the cap.
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Open the lock on the trumpet.
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Put the trumpet on the bottle.
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Your gas horn it's now up and running, ready to be used again!
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There's no limit on the number of times you change the gas bottle.
There's no limit on the number of times you change the gas bottle.
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